cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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static_call.h (1063B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_POWERPC_STATIC_CALL_H
      3#define _ASM_POWERPC_STATIC_CALL_H
      4
      5#define __PPC_SCT(name, inst)					\
      6	asm(".pushsection .text, \"ax\"				\n"	\
      7	    ".align 5						\n"	\
      8	    ".globl " STATIC_CALL_TRAMP_STR(name) "		\n"	\
      9	    STATIC_CALL_TRAMP_STR(name) ":			\n"	\
     10	    inst "						\n"	\
     11	    "	lis	12,2f@ha				\n"	\
     12	    "	lwz	12,2f@l(12)				\n"	\
     13	    "	mtctr	12					\n"	\
     14	    "	bctr						\n"	\
     15	    "1:	li	3, 0					\n"	\
     16	    "	blr						\n"	\
     17	    "2:	.long 0						\n"	\
     18	    ".type " STATIC_CALL_TRAMP_STR(name) ", @function	\n"	\
     19	    ".size " STATIC_CALL_TRAMP_STR(name) ", . - " STATIC_CALL_TRAMP_STR(name) " \n" \
     20	    ".popsection					\n")
     21
     22#define PPC_SCT_RET0		20		/* Offset of label 1 */
     23#define PPC_SCT_DATA		28		/* Offset of label 2 */
     24
     25#define ARCH_DEFINE_STATIC_CALL_TRAMP(name, func)	__PPC_SCT(name, "b " #func)
     26#define ARCH_DEFINE_STATIC_CALL_NULL_TRAMP(name)	__PPC_SCT(name, "blr")
     27#define ARCH_DEFINE_STATIC_CALL_RET0_TRAMP(name)	__PPC_SCT(name, "b .+20")
     28
     29#endif /* _ASM_POWERPC_STATIC_CALL_H */